Polyatomic candidates for cooling of molecules with lasers from simple theoretical concepts

A rational approach to identify polyatomic molecules that appear to be promising candidates for direct Doppler cooling with lasers is outlined. First-principle calculations for equilibrium structures and Franck--Condon factors of selected representatives with different point-group symmetries (including chiral non-symmetric group C$_1$) have been performed and high potential for laser-cooling of these molecules is indicated.